142148021 has 2 divisors, whose sum is σ = 142148022. Its totient is φ = 142148020.

The previous prime is 142147979. The next prime is 142148029. The reversal of 142148021 is 120841241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134884996 + 7263025 = 11614^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 142148021 - 2²⁶ = 75039157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142148029) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71074010 + 71074011.

It is an arithmetic number, because the mean of its divisors is an integer number (71074011).

Almost surely, 2^142148021 is an apocalyptic number.

It is an amenable number.

142148021 is a deficient number, since it is larger than the sum of its proper divisors (1).

142148021 is an equidigital number, since it uses as much as digits as its factorization.

142148021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 142148021 is about 11922.5844933051. The cubic root of 142148021 is about 521.8915588755.

Adding to 142148021 its reverse (120841241), we get a palindrome (262989262).

The spelling of 142148021 in words is "one hundred forty-two million, one hundred forty-eight thousand, twenty-one".